1 From the Department of Anaesthesiology and Intensive Care, Division of Surgery, Akershus University Hospital Oslo, Norway (TGH), the Department of Clinical Research - Anaesthesiology, University of Southern Denmark, Odense, Denmark (TGH), the Department of Anaesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University Hospitals of Geneva, Geneva, Switzerland (LV), the Unit for Research & Innovation, Department of Anaesthesia, IRCCS Instituto Giannina, Gaslini, Genova, Italy (ND), the Department of Anaesthesia and Intensive Care, Cnopf Children's Hospital/Hospital, Hallerwiese, Nürnberg, Germany (KB-J), the Department of Anaesthesia, University Children's Hospital, Zürich, Switzerland (JE, MW), the Department of Anaesthesia & Intensive Care, Section of Paediatric Anaesthesia & Intensive care, Uppsala University Hospital, Uppsala, Sweden (PF), the Department of Anaesthesiology, Sophia Children's Hospital, Erasmus Medical Centre, Rotterdam, Rotterdam, The Netherlands (AM) and the Department of Anaesthesia, Montreal Children's Hospital, Montreal, QC, Canada (TE).